Incubator



(No Model.)

C. H. JOHNSON.

INCUBATOR.

' vPatented Jan. 4,1898.

lIIIll/llll/llllllllll.'lll/11111111127111111711'Il/llllllIlIll/lll/ll11111111111111111111'Il Il' III rdiff l 1 l l l l I l l l l l 1 1 l I l 1 l l l 1 l I l l ml l l l l l l l I UNITE-D STATES PATENT Orricn.

CHARLES H. JOHNSON, OF FINDLAY, OIIIO.

lNCUBATOR.

SPECIFICATION forming part of Letters Patent No. 5596,59?, dated January4, 1898.

Application led March `26V, l 8 9 7.

Ohio, have invented certain new and useful Improvements in Incubators,of which the following is a specification, reference being had thereinto the accompanying drawings.

The invention has reference generally to incubators, but moreparticularly to the ventilating mechanism used in connection withdevices of this kind.

The object of the invention is to construct and arrange the Ventilatingdevices in such manner that when too high atemperature eX- ists withinthe incubator the latter may be quickly and automatically cooled withoutchilling the eggs therein. To attain this object, I divide theincubator-casing into two chambers, placing in one a water-receptacle,the heated water therein being adapted to heat the incubator to thedesired temperature, and in the other chamber the usual egg-trays. Thenby arranging a damper in the partition between the two chambers and oneor more dampers in the heating-chamber, connecting the same by suitableconnecting devices, I provide means for cooling the upper chamber andindirectly lowering the temperature of the lower chamber without havinga cold draft of any sort blow upon and chill the eggs.

With this object in view my invention consists in the peculiar formationof an incubator and in the novel construction and arrangement of itsvarious parts, all as more fully hereinafter described, and shown in theaccompanying drawings, in which- Figure l is a verticall centrallongitudinal section through the incubator, showing the same as in use.Fig. 2 is a section taken on line x x, Fig. l; and Fig. 3 is an enlargeddetail perspective view of the devices for actuating one of the dampers.

In the construction of the device the letter A represents theincubator-casing, formed, preferably, of double walls, between which isplaced-the usual non-conducting material to prevent the outertemperature being communicated to the interior of the casing, and B theusual legs therefor. Within the cas ing and approximately at the centerthereof is a horizontal partition C, which divides the serial No.629,330. (No moda.)

inclosing casing into an upper chamber D and a lower chamber E. In theupper chamber, near the top thereof, is arranged a water-tank F, thewater therein being heated by means of a heating apparatus G. Thislatter apparatus comprises an ordinarylamp H, mounted upon a bracket I,secured to the casing, and a cylindrical water-heater J, provided with acentral line K, through which the products of combustion are adapted topass, said water-heater communicating with the watertank inthe incubatorby means of the pipes L and M, as plainly shown in Fig. l. In the lowerchamber, near the bottom thereof, are

located the usual egg-trays N N, each comprising a frame O, having aseries of triangular partitions therein, rollers O', and a cloth y P,preferably of wire, secured to the rollers between the latter and thetriangular partitions forming a support for the eggs.

In the partition C islooated a damper Q, pivotally connected, as at AQ,with the partition. In the upper chambers are dampers R R', similar inconstruction to the damper Q, swingingly supported upon pivots S, and Tis a thermostat, preferably in the form of an ordinary double-leaf bar,secured to the under side of the partition.

To obtain the results desired, I employ actuating devices for the threedampers mentioned, automatically operated by the thermostatic bar, whichwill close the partitiondamper when the dampers R R open and which willclose the latter dampers when the partition-damper opens. By thisarrangement of ventilators I am enabled, when the temperature within theincubator is too high, to cool the upper chamber quickly by means of adraft passing therethrough without allowing said draft to enter theegg-chamber. When the upper chamber is cool, the temperature within theegg-chamber will be gradually lowered and the Ventilating mechanism willslowly open the partition-damper,thereby equalizing the heat within bothchambers and at the same time closing the dampers which communicate withthe surrounding atmosphere. The means employed to attain these resultsare as follows:

Upon the upper portion of the damper R and upon the lower part of thedamper R are eye-screws connected by means of a bar V, which bar isprovided at its center with a stud V. At the center of thepartition-damper and beneath the same is a threaded bolt W, Which isconnected adjustably With the free end of the thermostat by nuts u, andb. The connecting-bar V and the damper Q are connected by means of abell-crank lever X, pivoted between bifurcations upon the free end of abracket-arm Y, secured to the partition, one arm of the lever X beingslotted, as at Z, to engage the stud V, and the other arm of said leveris connected by means of a link Z' to an eye-screw Z, secured to thedamper Q.

It Will be noticed by the arrangement and construction of thedamper-operating devices thus set forth that the thermostat T actsdirectly upon the damper Q and that this damper operates thecasing-dampers in a very simple manner, the entire mechanism requiringvbut few parts, which are simple in construction and Which are notliable to get out of order. It is further to be noticed that aneffective means is employed for regulating the temperature of theegg-chamber Without in any manner chilling the eggs therein, as thesurrounding atmosphere, which eventually enters the egg-chamber, isheated to a considerable extent by its passage through the up,- perchamber before it enters the lower chamber, thereby taking the chill oithe same.

The nuts a and b permit the thermostat to be adj-usted at its free end,yso as to regulate the temperature to any desired degree, the adjustmentof the thermostat relatively to the dam-perQ determining how much thedampers Will be opened by the bending of the thermostat.

Having thus described my invention, What I claim, and desire to secureby Letters Patent, is-

An incubator comprising the following instrumentalities: an inclosingcasing provided With a central'parti-tiondividing said casing into anupper heating-chamber and 'lower egg-chamber, dampers R and R', and adamper in the partition, a thermostat secured to said partition inproximity to the damper therein, having a central connection with thelatter,v the dam per-connectin g bar V, support Y, slotted bell-cranklever X engaging at one end the stud V upon. the connecting-bar, and alink connectin gv the other end of the lever to the partition-damper,substantially as shown and described.

In testimony whereof I affix my signature in presence of two Witnesses.

CHARLES H. JOHNSON.

